diff --git a/src/structs.h b/src/structs.h
index 09158a0..5787d2b 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -2891,6 +2891,7 @@
     pos_save_T	w_save_cursor;	    /* backup of cursor pos and topline */
 #ifdef FEAT_TEXT_PROP
     int		w_popup_flags;	    // POPF_ values
+    char_u	*w_popup_title;
     poppos_T	w_popup_pos;
     int		w_popup_fixed;	    // do not shift popup to fit on screen
     int		w_zindex;